PASCO Franck-Hertz System

Purpose: As early as 1914, James Franck and Gustav Hertz discovered in the course of their investigations an energy loss in distinct steps for electrons passing through mercury vapor and a corresponding emission at the ultraviolet line (λ= 254 nm) of mercury. They performed this experiment that has become one of the classic demonstrations of the quantization of atomic energy levels. What's Included: 1× Franck-Hertz Tube Enclosure with Argon Tube (SE-9650A) 1× DC Power Supply I (Constant Voltage) (SE-6615) 1× DC Power Supply II (Constant Voltage) (SE-9644) 1× DC Current Amplifier (SE-6621) 1× Red and Black Patch Cords